Add a context variable with current path

[nils-van-zuijlen]

I'm trying to create a nav with an element that signifies which is the current page, but I can't work it out.

It would be easier if there was a way to easily know which page is rendered from the Jinja context.

It may be implemented by adding a current_path context variable, derived from the base_path and the view's path.
Also, another requirement for it would be that it corresponds to the output of the url templatetag for that view.